:root { --ink:#071426; --deep:#0b1a2d; --mint:#55e4ce; --muted:#8fa2b7; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:#f5f8fb; color:#172235; font-family:"Microsoft YaHei","Noto Sans SC",system-ui,sans-serif; font-size:16px; line-height:1.65; overflow-x:hidden; }
a { color:inherit; text-decoration:none; }
button,a { -webkit-tap-highlight-color:transparent; }
button { font:inherit; }
img { max-width:100%; display:block; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:9px; border:0; cursor:pointer; transition:.2s ease; }

.site-header { position:fixed; z-index:50; inset:0 0 auto; height:76px; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; padding:0 max(5vw,28px); color:#f5fbff; background:rgba(7,20,38,.86); border-bottom:1px solid rgba(255,255,255,.1); backdrop-filter:blur(18px); }
.brand { display:inline-flex; align-items:center; gap:11px; width:max-content; font-weight:800; letter-spacing:.02em; }
.brand em { font-size:10px; font-style:normal; letter-spacing:.18em; color:var(--mint); border:1px solid rgba(85,228,206,.45); border-radius:999px; padding:2px 7px; }
.brand-mark { position:relative; display:inline-block; width:42px; height:42px; overflow:hidden; border-radius:13px; background:#fff; box-shadow:inset 0 0 0 1px rgba(255,255,255,.55); flex:none; }
.brand-mark img { width:100%; height:100%; object-fit:cover; }
.main-nav { display:flex; align-items:center; gap:34px; font-size:14px; color:#b8c7d8; }
.main-nav a { transition:color .2s ease; }
.main-nav a:hover { color:#fff; }
.header-download { justify-self:end; height:42px; padding:0 18px; border-radius:12px; background:var(--mint); color:var(--ink); font-weight:800; }
.header-download:hover { background:#7af0dd; }
.menu-button { display:none; justify-self:end; width:42px; height:42px; padding:0; border:0; border-radius:12px; background:transparent; color:#fff; font-size:26px; cursor:pointer; }

.hero { position:relative; min-height:850px; padding:155px max(6vw,32px) 44px; display:grid; grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr); grid-template-rows:1fr auto; gap:40px 7vw; color:#f4f9ff; background:var(--ink); overflow:hidden; }
.hero-grid { position:absolute; inset:0; opacity:.18; background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px); background-size:62px 62px; mask-image:linear-gradient(to bottom,#000,transparent 88%); }
.hero-orb { position:absolute; width:430px; height:430px; border-radius:50%; filter:blur(90px); opacity:.25; }
.hero-orb-one { right:4%; top:16%; background:#35d8c1; }
.hero-orb-two { left:-12%; top:52%; background:#2263d9; }
.hero-copy { position:relative; z-index:2; align-self:center; max-width:680px; }
.section-kicker { display:inline-flex; align-items:center; gap:10px; font-size:12px; font-weight:800; letter-spacing:.2em; color:var(--mint); }
.hero-brand { display:flex; align-items:center; gap:14px; width:max-content; padding:8px 16px 8px 8px; border:1px solid rgba(255,255,255,.12); border-radius:19px; background:rgba(255,255,255,.06); box-shadow:0 14px 35px rgba(0,0,0,.16); backdrop-filter:blur(10px); }
.hero-brand>img { width:58px; height:58px; border-radius:15px; object-fit:cover; }
.hero-brand>div { display:grid; line-height:1.3; }
.hero-brand strong { color:#fff; font-size:17px; }
.hero-brand span { color:var(--mint); font-size:12px; letter-spacing:.12em; }
.hero h1 { margin:22px 0; font-size:clamp(52px,6.2vw,94px); line-height:.98; letter-spacing:-.055em; font-weight:800; }
.hero h1 strong { color:var(--mint); }
.hero-copy>p { max-width:590px; margin:0; font-size:clamp(17px,1.5vw,21px); line-height:1.85; color:#afbed0; }
.hero-actions { display:flex; align-items:center; gap:25px; margin-top:34px; }
.primary-cta { min-height:56px; padding:0 24px; border-radius:14px; background:var(--mint); color:var(--ink); font-size:16px; font-weight:800; box-shadow:0 16px 36px rgba(85,228,206,.18); }
.primary-cta:hover { background:#7af0dd; transform:translateY(-2px); }
.service-cta { display:inline-flex; align-items:center; justify-content:center; gap:8px; min-height:56px; padding:0 22px; border:1px solid rgba(85,228,206,.55); border-radius:14px; color:#eafffc; background:rgba(85,228,206,.08); font-weight:800; transition:.2s ease; }
.service-cta:hover { border-color:var(--mint); background:rgba(85,228,206,.16); transform:translateY(-2px); }
.hero-service-line { display:flex; align-items:center; gap:11px; width:max-content; max-width:100%; margin-top:16px; padding:9px 13px; border-radius:11px; background:rgba(255,255,255,.06); color:#dce8f2; font-size:13px; }
.hero-service-line span { color:#8fa2b7; }
.hero-service-line strong { color:#fff; font-size:14px; letter-spacing:.04em; }
.hero-service-line i { width:3px; height:3px; border-radius:50%; background:var(--mint); }
.hero-service-line b { margin-left:3px; color:var(--mint); font-size:12px; }
.trust-row { display:flex; flex-wrap:wrap; gap:22px; margin-top:30px; color:var(--muted); font-size:13px; }
.trust-row span { display:flex; align-items:center; gap:7px; }
.hero-visual { position:relative; z-index:2; display:grid; place-items:center; min-height:560px; }
.phone-shell { width:min(330px,78vw); height:610px; padding:10px; border-radius:44px; background:linear-gradient(145deg,#edf5fa,#8fa2b1); box-shadow:0 38px 100px rgba(0,0,0,.48),inset 0 0 0 1px rgba(255,255,255,.7); transform:rotate(3deg); overflow:hidden; }
.phone-shell img { width:100%; height:100%; object-fit:cover; object-position:top; border-radius:35px; }
.phone-top { position:absolute; z-index:3; top:15px; left:50%; width:108px; height:23px; transform:translateX(-40%); border-radius:0 0 15px 15px; background:#07111f; }
.phone-top span { position:absolute; width:36px; height:4px; left:50%; top:6px; transform:translateX(-50%); border-radius:99px; background:#344154; }
.score-card { position:absolute; z-index:4; padding:14px 18px; border:1px solid rgba(255,255,255,.18); background:rgba(18,38,62,.83); border-radius:16px; box-shadow:0 18px 45px rgba(0,0,0,.3); backdrop-filter:blur(12px); }
.score-card-top { top:15%; left:0; display:grid; grid-template-columns:auto auto; gap:0 18px; }
.score-card-top span { font-size:13px; color:#a9b9cb; }
.score-card-top strong { font-size:22px; color:var(--mint); }
.score-card-top i { grid-column:1/-1; width:100%; height:3px; margin-top:9px; border-radius:99px; background:linear-gradient(90deg,var(--mint) 78%,rgba(255,255,255,.14) 78%); }
.score-card-bottom { right:-4%; bottom:14%; display:flex; gap:12px; align-items:center; }
.score-card-bottom b { color:#ffc75a; font-size:22px; }
.score-card-bottom span { display:grid; font-size:12px; color:#9fb0c2; }
.score-card-bottom strong { font-size:15px; color:#fff; }
.hero-facts { position:relative; z-index:2; grid-column:1/-1; display:grid; grid-template-columns:repeat(3,1fr); padding-top:30px; border-top:1px solid rgba(255,255,255,.12); }
.hero-facts div { display:grid; gap:2px; padding-left:34px; border-left:2px solid rgba(85,228,206,.45); }
.hero-facts strong { font-size:18px; }
.hero-facts span { color:#7f93a8; font-size:13px; }

.section { padding:110px max(6vw,32px); }
.section-dark { background:var(--deep); color:#eef7ff; }
.section-heading { display:flex; align-items:end; justify-content:space-between; gap:35px; margin:0 auto 48px; max-width:1280px; }
.section-heading h2,.install-copy h2,.service-copy h2 { margin:8px 0 0; font-size:clamp(34px,4vw,56px); line-height:1.15; letter-spacing:-.04em; }
.section-heading>p { max-width:460px; margin:0; color:#91a4b9; }
.section-heading-light>p { color:#627083; }
.section-heading-light .section-kicker { color:#008e85; }
.feature-grid { display:grid; grid-template-columns:repeat(4,1fr); max-width:1280px; margin:0 auto; border-block:1px solid rgba(255,255,255,.12); }
.feature-card { position:relative; min-height:330px; padding:42px 30px; border-right:1px solid rgba(255,255,255,.12); overflow:hidden; transition:background .25s ease; }
.feature-card:last-child { border-right:0; }
.feature-card:hover { background:rgba(85,228,206,.06); }
.feature-icon { display:block; margin:30px 0 32px; color:var(--mint); font-size:36px; line-height:1; }
.feature-index { font-family:monospace; font-size:12px; letter-spacing:.12em; color:#5f768d; }
.feature-card h3 { margin:0 0 12px; font-size:23px; }
.feature-card p { margin:0; color:#8ea1b5; font-size:15px; }

.gallery-section { background:#f5f8fb; }
.screenshot-track { display:grid; grid-template-columns:minmax(380px,1.55fr) repeat(5,minmax(220px,1fr)); gap:22px; max-width:1520px; margin:0 auto; overflow-x:auto; padding:4px 2px 20px; scroll-snap-type:x mandatory; }
.screenshot-card { margin:0; min-width:220px; scroll-snap-align:start; }
.screenshot-window { height:480px; padding:8px; border:1px solid #dbe3eb; border-radius:28px; background:#fff; box-shadow:0 16px 34px rgba(15,34,55,.08); overflow:hidden; }
.screenshot-window img { width:100%; height:100%; object-fit:cover; object-position:top; border-radius:20px; }
.screenshot-wide { min-width:380px; }
.screenshot-wide .screenshot-window { height:auto; aspect-ratio:1280/861; display:grid; place-items:center; }
.screenshot-wide .screenshot-window img { object-fit:contain; object-position:center; }
.screenshot-card figcaption { display:flex; gap:12px; align-items:center; margin-top:15px; font-weight:800; }
.screenshot-card figcaption span { color:#008e85; font-family:monospace; font-size:12px; }

.install-section { display:grid; grid-template-columns:.8fr 1.2fr; gap:8vw; padding:110px max(7vw,40px); color:#fff; background:linear-gradient(135deg,#0c827d,#075c61); }
.install-copy p { max-width:460px; color:#c9ebea; }
.dark-cta { margin-top:18px; background:var(--ink); color:#fff; box-shadow:none; }
.dark-cta:hover { background:#102941; }
.install-steps { list-style:none; margin:0; padding:0; border-top:1px solid rgba(255,255,255,.25); }
.install-steps li { display:grid; grid-template-columns:72px 1fr; gap:20px; align-items:start; padding:24px 0; border-bottom:1px solid rgba(255,255,255,.25); }
.install-steps li>span { color:#78eee1; font:700 13px/1 monospace; letter-spacing:.1em; padding-top:7px; }
.install-steps strong { font-size:20px; }
.install-steps p { margin:4px 0 0; color:#bde1e0; font-size:14px; }

.service-section { background:var(--ink); color:#fff; }
.service-card { max-width:1280px; margin:0 auto; display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:34px; padding:46px; border:1px solid rgba(255,255,255,.13); border-radius:28px; background:linear-gradient(120deg,rgba(255,255,255,.06),rgba(85,228,206,.07)); }
.service-icon { display:grid; place-items:center; width:84px; height:84px; border-radius:22px; background:var(--mint); color:var(--ink); font-size:38px; }
.service-copy h2 { font-size:clamp(30px,3.2vw,48px); }
.service-copy p { max-width:590px; margin:10px 0 0; color:#95a9bd; }
.wechat-list { display:grid; gap:12px; }
.wechat-button { display:flex; align-items:center; justify-content:space-between; gap:20px; min-width:210px; height:58px; padding:0 16px; border:1px solid rgba(255,255,255,.2); border-radius:13px; background:rgba(255,255,255,.06); color:#fff; cursor:pointer; }
.wechat-button:hover { background:rgba(85,228,206,.11); }
.wechat-button>span { display:grid; text-align:left; font-size:16px; line-height:1.25; }
.wechat-button small { color:#8195aa; font-size:11px; font-weight:500; }
.wechat-button b { color:var(--mint); font-size:13px; }

.faq-section { background:#fff; }
.faq-list { max-width:1000px; margin:0 auto; }
.faq-list details { border-top:1px solid #dce4eb; }
.faq-list details:last-child { border-bottom:1px solid #dce4eb; }
.faq-list summary { list-style:none; display:flex; justify-content:space-between; align-items:center; gap:20px; padding:24px 0; cursor:pointer; font-size:18px; font-weight:800; }
.faq-list summary::-webkit-details-marker { display:none; }
.faq-list summary span { color:#008e85; font-size:25px; transition:transform .2s ease; }
.faq-list details[open] summary span { transform:rotate(45deg); }
.faq-list details p { max-width:780px; margin:-8px 0 26px; color:#5f6d7b; }

footer { display:grid; grid-template-columns:auto 1fr auto; gap:24px 60px; align-items:center; padding:45px max(6vw,32px); color:var(--muted); background:#050e19; font-size:13px; }
.footer-brand { display:flex; align-items:center; gap:10px; color:#fff; font-size:16px; }
footer>p { margin:0; }
footer>div:nth-of-type(2) { display:flex; gap:18px; color:#c6d3df; }
footer>small { grid-column:1/-1; padding-top:20px; border-top:1px solid rgba(255,255,255,.1); }
.floating-service { position:fixed; z-index:55; right:18px; bottom:22px; display:flex; align-items:center; gap:11px; min-height:58px; padding:8px 16px 8px 9px; border:1px solid rgba(255,255,255,.45); border-radius:17px; background:#fff; color:var(--ink); box-shadow:0 16px 45px rgba(7,20,38,.25); transition:.2s ease; }
.floating-service:hover { transform:translateY(-3px); box-shadow:0 20px 50px rgba(7,20,38,.32); }
.floating-service-icon { display:grid; place-items:center; width:40px; height:40px; border-radius:12px; background:var(--mint); font-size:22px; }
.floating-service>span:last-child { display:grid; line-height:1.25; }
.floating-service small { color:#697789; font-size:11px; }
.floating-service strong { font-size:13px; letter-spacing:.02em; }
.mobile-download { display:none; }

@media (max-width:1050px) {
  .site-header { grid-template-columns:1fr auto; }
  .main-nav { display:none; position:absolute; top:76px; left:18px; right:18px; flex-direction:column; align-items:stretch; gap:0; padding:10px; border:1px solid rgba(255,255,255,.14); border-radius:18px; background:var(--deep); box-shadow:0 20px 50px rgba(0,0,0,.35); }
  .main-nav-open { display:flex; }
  .main-nav a { padding:13px 15px; }
  .header-download { display:none; }
  .menu-button { display:block; }
  .hero { grid-template-columns:1fr 380px; gap:30px; }
  .hero h1 { font-size:clamp(50px,7.2vw,72px); }
  .feature-grid { grid-template-columns:repeat(2,1fr); }
  .feature-card:nth-child(2) { border-right:0; }
  .feature-card:nth-child(-n+2) { border-bottom:1px solid rgba(255,255,255,.12); }
  .service-card { grid-template-columns:auto 1fr; }
  .wechat-list { grid-column:2; grid-template-columns:repeat(2,1fr); }
  footer { grid-template-columns:1fr auto; }
  footer>p { grid-row:2; }
}

@media (max-width:760px) {
  html { scroll-padding-top:64px; }
  body { padding-bottom:calc(128px + env(safe-area-inset-bottom)); }
  .site-header { height:64px; padding:0 14px; }
  .main-nav { top:64px; left:12px; right:12px; }
  .brand { gap:8px; font-size:16px; }
  .brand-mark { width:38px; height:38px; border-radius:11px; }
  .brand em { display:none; }
  .menu-button { width:40px; height:40px; font-size:24px; }
  .hero { min-height:auto; grid-template-columns:minmax(0,1fr); padding:94px 18px 28px; gap:30px; }
  .hero-brand { gap:11px; padding:6px 13px 6px 6px; border-radius:16px; }
  .hero-brand>img { width:48px; height:48px; border-radius:12px; }
  .hero-brand strong { font-size:15px; }
  .hero-brand span { font-size:11px; }
  .hero h1 { font-size:clamp(42px,13vw,56px); line-height:1.02; margin:20px 0 16px; letter-spacing:-.05em; }
  .hero-copy>p { font-size:16px; line-height:1.75; }
  .hero-actions { align-items:stretch; flex-direction:column; gap:12px; margin-top:26px; }
  .primary-cta { width:100%; min-height:54px; padding:0 18px; }
  .service-cta { min-height:50px; width:100%; }
  .hero-service-line { width:100%; justify-content:center; flex-wrap:wrap; margin-top:13px; padding:10px; }
  .hero-service-line b { width:100%; margin:0; text-align:center; }
  .trust-row { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; margin-top:22px; font-size:12px; }
  .trust-row span { justify-content:center; min-height:38px; padding:6px; text-align:center; border:1px solid rgba(255,255,255,.08); border-radius:10px; background:rgba(255,255,255,.035); }
  .hero-visual { min-height:410px; }
  .phone-shell { width:220px; height:400px; padding:7px; border-radius:31px; }
  .phone-shell img { border-radius:25px; }
  .phone-top { top:10px; width:78px; height:18px; }
  .score-card { padding:10px 12px; border-radius:13px; }
  .score-card-top { top:12%; left:0; }
  .score-card-top strong { font-size:18px; }
  .score-card-bottom { right:0; bottom:10%; }
  .score-card-bottom b { font-size:18px; }
  .hero-facts { grid-template-columns:repeat(3,minmax(0,1fr)); gap:0; padding-top:22px; }
  .hero-facts div { padding:0 8px 0 12px; }
  .hero-facts strong { font-size:14px; line-height:1.35; }
  .hero-facts span { margin-top:4px; font-size:11px; line-height:1.4; }
  .section { padding:64px 18px; }
  .section-heading { align-items:start; flex-direction:column; gap:15px; margin-bottom:34px; }
  .section-heading h2,.install-copy h2,.service-copy h2 { font-size:34px; }
  .section-heading>p { font-size:15px; }
  .feature-grid { grid-template-columns:1fr; }
  .feature-card { min-height:auto; padding:30px 6px; border-right:0; border-bottom:1px solid rgba(255,255,255,.12); }
  .feature-card:last-child { border-bottom:0; }
  .feature-icon { margin:16px 0; }
  .feature-card h3 { font-size:21px; }
  .screenshot-track { margin-right:-18px; grid-template-columns:calc(100vw - 52px) repeat(5,218px); gap:14px; padding-right:18px; scrollbar-width:none; }
  .screenshot-track::-webkit-scrollbar { display:none; }
  .screenshot-wide { min-width:0; }
  .screenshot-wide .screenshot-window { width:100%; height:auto; aspect-ratio:1280/861; }
  .screenshot-window { height:430px; padding:6px; border-radius:23px; }
  .screenshot-window img { border-radius:17px; }
  .install-section { grid-template-columns:1fr; gap:38px; padding:64px 18px; }
  .install-copy>p { font-size:15px; }
  .install-steps li { grid-template-columns:54px 1fr; gap:12px; padding:20px 0; }
  .install-steps strong { font-size:18px; }
  .service-card { grid-template-columns:1fr; gap:22px; padding:26px 20px; border-radius:22px; }
  .service-icon { width:66px; height:66px; }
  .service-copy p { font-size:15px; }
  .wechat-list { grid-column:auto; grid-template-columns:1fr; }
  .wechat-button { width:100%; }
  .faq-list summary { padding:20px 0; font-size:16px; }
  .faq-list details p { font-size:15px; }
  footer { grid-template-columns:1fr; gap:18px; padding:38px 18px; }
  footer>p { grid-row:auto; }
  footer>div:nth-of-type(2) { flex-wrap:wrap; }
  .floating-service { left:10px; right:10px; bottom:calc(max(8px,env(safe-area-inset-bottom)) + 60px); min-height:48px; padding:6px 13px 6px 7px; border-radius:14px; }
  .floating-service-icon { width:36px; height:36px; border-radius:10px; font-size:20px; }
  .floating-service>span:last-child { grid-template-columns:auto 1fr; align-items:center; gap:0 8px; }
  .floating-service small { font-size:11px; }
  .floating-service strong { font-size:12px; }
  .mobile-download { position:fixed; z-index:60; display:flex; align-items:center; justify-content:center; gap:9px; left:10px; right:10px; bottom:max(8px,env(safe-area-inset-bottom)); height:54px; border:1px solid rgba(255,255,255,.55); border-radius:15px; background:var(--mint); color:var(--ink); font-size:16px; font-weight:900; box-shadow:0 13px 35px rgba(7,20,38,.3); }
}

@media (max-width:390px) {
  .hero { padding-inline:16px; }
  .hero h1 { font-size:42px; }
  .hero-facts strong { font-size:13px; }
  .score-card-top { left:-6px; }
  .score-card-bottom { right:-6px; }
}

@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } * { transition-duration:.01ms!important; } }